Winding machine



April 27 1926.

I 1. c. ORSWELL WINDING MACHINE Filed March 2 1923 6 Shets-Sheet 1 .m. a. fe

W 1. DYLMQU Lia. T QM??- W April 27, 1926.

LC. ORSWELL WINDING MACHINE Filed Ma rch 26, 192-3 6 Sheets-Sheet 2 jn'amf M (3- DYMMJQJ A L W.

April 27 1926.

1,582,777 c. ORSWELL WINDING MACHINE Filed March 26, 1923 6 Sheets-Shqet 5 April 27, 1926. I 1,582,777

' II.C.ORSWELL WINDING MACHINE Filed March 26, 1923 s sh et -sh t, 4

April 27 1926.

l' C ORSWELL WINDING MACHINE 1,582,777 I. C. 'ORSWELL WINDING MACHINE Filed March 26, 1923 6 Sheets-Sheet 6 Ijiyj v April 27 1926.

was-s Patented Apr. 27,

ISRAEL ORSWELL, OF MEDFORD. MASSACHUSETTS.

WINDING MACHINE.

Application filed March 26, 1.923.

To all whom it may concern:

Be it known that I, Isnnnn C. Onswnnn, a

citizen of the United States. residing at Medford, in the county of Middlesex and State of lvlassachusctts, have invented certain new and useful Improvements in Winding Machines; and I do hereby declare the followingto he full, clear, and exact description of the invention, such as will. onable others skilled in the art to which it appertains to make and use the same.

The present invention relates to winding machines and more particularly to machines for winding conv'olutions of wire yarn or other winding material upon a suitable skeleton form to produce a, so-called basket weave.

The object of the present invention is to provide a machine for manufacturing articles of this general nature, by which a product of high quality and uniform characteristics may he quickly and economically obtained.

"With this object in view, one feature of the present invention contemplates the pro vision of a rotatable forming head adapted to receive the support or form to be wound, together with an oscillating guiding member for automatically laying the winding material on opposite sides of adjacent arms of the form.

Another feature of the invention contemplates the provision of means acting in timed relation between the various arms of the form or support to force the convolutions of winding material as they are laid upon the support into proper position thereupon in a manner to form a complete and substantially uniform winding.

Still further features of the invention consist in certain novel features of construction, con'ihinations and arrangement of parts hereinafter described and claimed. the advantages of which will he apparent to those skilled in the art upon reference to the following description.

In the drawings illustmting the preferred form of the invention, Figure l is a plan view of a machine embodying the features of the invention: Fig. 2 is an elevation of the 'iachine shown in 1; Fig. 3 is an elevat on in section on line 3-3 of Fig. 2; Fig. 4 a detail sl'iowing the clutch and releasing "in; 55 is an elevation in section able forming-head in. connection Serial No. 627,602.

with the cam mechanism; Fig. 6 is a section on line 66 of Fig. Fig.7 is a plan view of a modification of the cam mechanism in connection with the rotatable head; Fig. 8 is a sectional elevation of the modification shown in Fig. 7; Fig. 9 is a sectional elevation on line 9-9 of Fig. 7; Fig. 10 is a plan view showing the manual control means for the apparatus shown in Figs. 7 and 8; Fig. 11 is a view of a stamping adapted to be bent and wound in basket weave fashion; Fig. 12 is a plan view of a hemispherical skeleton form showing the manner of starting the winding material; and Fig. 13 is an elevation of the form shown in Fig. 12.

The illustrated embodiment of the invention is designed primarily for the construction of the type of spherical inductance coils disclosed in the co pending application of Tyzzer, Serial No. 538,913 filed Feb. 24, 1922. The above application describes a certain novel type of inductance coil having convolutions of conducting wire wound in basket weave fashion upon a skeleton hemispherical form. This form may be constructed or molded originally in its curved shape but is preferably bent from a flat stamping having a series of radiating arms. As indicated in Figs. 11, 12 and 18, the preferred form of the hemispherical support is constructed from a Hat stamping of fibre or other insulating material having a ring or hub ,15 and a series of spaced arms 16, 17', 18, etc. In the winding operation, the fiat stamping is curved over a suitable form into the hemispherical shape shown in Figs. 12 and i3 and the convolutions of wire 20 are started upon the form in the manner indicated. Two of such hemispherical supports on completion of the winding may be joined together at the ends of the arms to form a spherical coil. In the winding of such hemispherical coils according to the present invention. the skeleton form is mounted upon a rotatable forming-head having a general contour corresponding to the desired shape of tie finished coil. The wire is wound upon opposite sides of adjacent arms of the form by a guiding member which is caused to oscillate in synchronism with the rotation of the forming-head.

The forming-head is provided with a series of slots within which a s or compression fingers are actuated in a humor to "ce each convolution of v irc is worn against the preceding convolution in a manner to form a complete and uniform winding. These fingers are actuated by a suitable cam which is adapted to recede in accordance with the building up of the winding. The skeleton form is maintained in engagement with the forming-head through a suitable retaining memher, which may be moved toward and from the forn'iing-liead by means of a suitable operating lever. This lever also convenient'l'y actuates a clutch mechanism, by which the machine may be automatically started and stopped as the form is moved into and out of engagement with the forming-head.

lteferring to the drawings, the improved winding machine comprises a belt driven pulley 22 freely rotatable upon the main shaft '24. The shaft is journaled for rotation in main bearings 25 and 26 mounted upon standards 27 which are secuzed to the base 8. A gear wheel 28 is l-Ieyed or otherwise secured to the shaft and is rotated by the pulley 22 through a pair of pins 29'and 30 connected respectively with the pulley and gear. Upon engagement of the pins the motion of the pulley 22 is transmitted to the gear 28 and the shaft 24. By means of a novel form of automatic release mechanism, to be hereinafter described, the two pins may be drawn out of engagement on completion of the winding, thus allowing the pulley 22 to rotate loosely upon the shaft. As indicated in Fig. 5, the main shaft 24 is connected by a pin 33 to a second shaft 32 which forms a part of the cam mechanism 10 and serves to rotate the forming head 11 which is attached to the shaft 32 by a screw key 34 or other suitable means. The forming head 11 is provided with a seat 35 adapted to engage the ring 15 of the stamping and is further provided with a plurality of arms 36 corresponding in number to the arms of the stamping and being curved to conform in shape to the final desired curvature of the skeleton support. The skeleton support is maintained in its proper position by a retaining member 12 mounted upon a rotatable shaft 37. This retaining inen'iher is provided with a flange 38 facing the seat 35 of the forminghead and adapted to curely clamp the ring 15 of the stamping in place. The arms of the stamping are enclosed by a ring attached to the hub of the retaining member by curved supports l0. hen the stamping is properly held in place over the forn'iing-head, the latter is rotated and the wire or other winding material. is conveyed on opposite sides of adjacent arms by a synchronously oscillating guiding member, to be later described in detail. The slots between the various arms of the forming-head are provided with camactuated compression fingers 41 adapted to press the wire immediately after its winding upon the form into its proper place adjacent the preceding convolution. These fingers are rotatably mounted on a curved wire shaft 43 and are provided with circular hubs L6 rotatable between drums 42 and 44, which are secured to the shaft in any desired manner. The fingers are held. in their normal upright position by tension springs 4:8 passing in openings of the drum l2 and attached to a wire ring 52, which bears against a flange 5% of a third drum 56, the periphery of the flange being provided with suitable slots 58 to aeconi modate the springs. The fingers e'tl are actuated by a cam 60 through bars or rods 62 sliding in longitudinal openings format by slots in the periphery of drum 4:2 and a surrounding collar G l. The cam 60 is provided with a hub portion 66 freely rotat l" e on shaft 32. The cam is allowed to pa 1K6 of axial motion to the left as the winding builds up, but is maintained against rotation, except for a slight rocking motion, to be hereafter described. To this end the b ing portion of the cam is allowed to ide within a bushing 68 mounted upon the main shaft 2% but is held from rotation with spect to the bushing by a key 70 slidable in a suitable slot 71. It will be seen that as the head 11 rotates, the rods 62 are mover successively over the cam thus actuating the proper fingers 41 to start pressing the wire into place immediately after it is wound about the corresponding arm of the stamp ing. As the winding builds up, the motion of the fingers 41 becomes more and more restricted, thus forcing the cam rearwardly against the compression of a helical spring 72 "hearing at one end against the rear face of the cam and at the other end against a collar 73 received upon the bushing moving parts are enclosed in cylindri containers T l, separated from bushing 6a and from each other by gaskets 76, which may be saturated with a suitable lubricant.

The mechanism for guiding the wire on opposite sides ofadjacent arms of the eton form consists of a guiding men'iher 35) secured in a slotted shaft 82 by a set screw 8% (Figs. 1 and 2). The guiding member is provided at its top with a slot thro which the winding material may be guided from a suitable spool to the winding form. The shaft 82 is journaled in a bearing member 86 having an extending arm adapted tohe bolted to the base The arm 88 is provided, after the usual n'ianuer. with a slot 90 to allow of adjustment of the bear ing member 86 relatively to the hose To this end, the base is provided with an opening 9% to allow motion of the bearii'ig memher to any desired position. The shaft 82 is oscillated by a collar 98 clamped about the shaft and adapted to be oscillated from the motion of aball eccentric coi'inected with a balland-socket joint 95 through a (II no link 97. It is to be noted that the guidingmember 80 is adjustable in the shaft 82 and the collar 98 is also adjustable around the shaft, thus permitting the guiding memher to be located in its most efiective position with great accuracy. The motion of the ball eccentric 95 is obtained through the rotation of a shaft 100 actuated from the main gear 27 through gears 102 and 10%. The shaft is journaled in suitable bearings 100 and 108. The gears are designed to cause the guiding member 80 to oscillate at exactly the proper time to lay the convolutions of wire accurately on opposite sides of adjacent arms of the stamping. In the pres ent case, with a skeleton form employing 1S) arms, the guiding member 80 is caused to undergo nine and a halt complete cycles per revolution of the forming-head.

The shaft 37, upon which the retaining member 12 is mounted, is journaled for retation in a bearing 120 mounted upon a standard 122. The sha'tt is moved to the right to allow the insertion of a skeleton winding form through a hand lever connected through a link 126 to an arm 128 attached to the standard 122. The lever is provided with a bearing 180 to accommodate the shaft 87. In the running position, the lever 12a seats in a notch 132 of an arm 13% extending from the standard 122. Upon completion oi a winding, the lever is lifted out of engagement with the notch and moved to the right, the bearing 130 engaging with a cotter pin 136. A spring 138 is mounted on the shaft adjacent the retaining member in order to prevent the latter from striking he bearing 120. The retaining member 12 yieldingly maintained against the ring oi the stamping through a spring 1 10 placed on shaft- 37 adjacent the bearing 130. In order to limit the motion of the shaft, a collar 1 12 is pinned to the shaft, the relative motion between the collar and the substantially stationary spring 140 being taken up by a suitable ball bearing 14:41. In operation, the stamping or form to be wound is placed in the proper position inside the retaining member and the wire is started from the guide member 80 over one or two of the arms oi the form and wound about one of the pins 1 1-0 which is inserted in the periphery of the, retaining member for the purpose of holdi one end 01 the winding. The hand level 121 is then moved to the left and by a clutch mechanism, to be presently (BXPlillllQtl, the pins 29 and 80 are brought into engagement, thus causing rotation of (he forming-head '11. The rear face of the forming-head is provided with a plurality (it regularly spaced openings 150. as is clearly indicated in Fig. 8. The retaining memher is provided with a number of pins 152 enclosed in suitable housings 15d and "forced outwardly toward the forming-head by springs 156 (Fig. 5). The pins are so disposed relatively to the openings 150 that only one pin may engage at any one time with anopening. In the present case the forming-head is provided with nineteen openings and the retaining member with three pins, the arrangement being such that one ot the pins will engage some one open; ing at least before one fitty-seventh of a revolution of the forming-head has been consummated. It will be seen that this arrangement impart-s the motion of the forminghead to the retaining member with a minimum of shock to any part of the apparatus.

As previously stated, it is desirable that a slight rocking motion be imparted to the cam 00, as will become apparent upon referring to Fig. 12. The apparatus is normally so d signed that after the wire or other winding material has been wound upon an arm of the skeleton form, the corresponding linger adjacent the arm is caused to begin its motion to compress the wire into its proper position. For example, in Fig. 12, after the wire has been laid above the arm 16, the compression linger lying in the slot between arms 16 and 17 starts its motion against the wire. However, in the case of the wire passing under an arm (for example, arm 17) it has been found desirable to retard the actuation of the corresponding fingeruntil the wire has been passed over the next adjacent arm, since the motion ot the finger between slots 17 and 18 has a tendency to draw the wire downwardly under the arm 18 before the oscillating guide 80 can move in the proper position to lay the wire above the arm 18. To this end, the cam is given a slight rocking motion in synchronism with the motion of the guiding member to retard the motion of the finger between arms 17 and 18 until the wire has been laid in its proper position over arm 18. This rocking motion is produced through an eccentric 160 actuated by the shaft 100 and connected by a rod 102 with a strap 162-3 surrounding the cam bushing 08 in the usual manner.

The starting and releasing mechanism for for apparatus includes the pin 80 which is axially slidable in an opening in the gear wheel 28. The pin is secured to a lever 10G .tulcrmned in a bracket 1438 attached to the gear 28. The lever passes through a slot 170 in the shaft 24. and is a 'lapted to be actuated by a sliding release 1723 which is freely'rnovable over the shaft 2 1. As previously explained when the pin 80 is in the position shown in Fig. 1, it engages the pin 29 connected with the pulley 22 in a manner to impart the rotation oi? the pulley to the gear. The pulley may be provided with a suitable spring take-up mechanism (not shown) for the purpose of taking up any shock which may occur when pins 29 and 30 are allowed to come in: contact with one another. The lever 166 is normally maintained by any desired spring means in the position shown, in a manner to hold the pins in engagement. The sliding release 172 is actuated by a rack 17 engaging a pinion 176 which is rotated by a worm gear 178 actuated through a worm 180 secured to the main shaft 24, (see Figs. 1 and 4). As will be obvious to those skilled in the art, the motion of the release member 172 along the shaft is in direct proportion to the number of revolutions of the forming-head. The pressure of the release 172 against the lever 166 brings pins 29 and out of engagement and stops the rotation of the forminghead. Upon removing the completed coil from the apparatus, the release mechanism is returned to its original position through a clutch member 182 which normally seats in a conical internal bore 18s of the worm gear 178. The pinion 17" o connected win the clutch through a shaft 186 which is bored to accommodate a control shaft 188 having a shoulder 190 bearing against a disk 192 rotatable with the clutch member 182 through a pin 19 i. A suitable screw 196 or otherretaining means is provided so the longitudinal motion of the disk 192 carries the worm gear 178 out of engagement with the clutch, thus causing he entire release mechanism to return to its original position through the action of a spring 200. The rack 17% is provided with a stop 202 adapted to strike against a bracket 204. The number of turns upon the winding may be regulated by moving the stop 202 along the rack 17% in such a manner as to vary the amount of motion of the release 172. The clutch mechanism is actuated through a control rod 206 connected to the hand lever 124, as indicated. The rod is provided at its left hand end with an actuator member 208 journaled in a bearing 210 and provided with a conical surface 212 adapted to engage a button 214 on the end of the internal shaft 188 in a manner to release the clutch memher and allow the return of the release to its proper position. The shaft 188 is provided with a suitable indicator 220 adapted to move over the face of a stationary dial 222 to indicate the number of turns of wire wound upon the skeleton support. The indicator 220 is preferably not connected directly to the shaft but is maintained on the shaft by a spring 22% adapted to hold the indicator frictionally against a washer 226 by pressure against a second washer 228 in such a manner that the indicator may be moved by hand if it b comes desirable to change the zero point,as will. be the case when the stop 202 is chz'ingcd relatively to the rack.

It will be seen that at the completion of a predetermined number of convolutions of winding, the release 172 will disengage the pins 29 and 30 from each other. The operator then moves the lever 124: to the right, thereby moving the retaining member 12 away from the finished coil which may then be removed. from the forminghead 11. The lever 12% carries with it the link 206 by which the clutch mechanism is operated, as previously described, to reset the release 172 to its original. position in preparation for winding another coil.

A modified and in some respects preferable form of cam mechanism is illustrated in Figs. 7 to 10 inclusive. Une feature of this improved mechanism lies in the use of sliding rather than rotating fingers, thereby avoiding the necessity of imparting the rocking motion to the cam. In this construction the cam is accurately fed in a long itudinal direction in accordance with the di mensions of the wire wound upon the skeleton form after the manner commonly employed for cutting screw threads on a lathe. liy this means, the motion of the cam is positively directed and readily determinable for any given size of winding material. Refer-ring particularly to the drawings, it will be seen that the forming-head 11 and the retaining member 12 are exactly the same as in the previous construction and are attached to their respective shafts in the same manner. The compression fingers indicated at 240 are provided with rearwardly 6X- tending straight portions 242 adapted to slide in suitable grooves in the drum 42 which is constructed in substantially the same manner as in the previously described construction. The fingers are also provided with depending portions adapted to receive the ends of tension springs 48 attached at the rear end to a drum 56 over a curved wire 52, as indicated. The barrel cam 60 is, as before, provided with a hub portion 66 freely movable over the shaft 32, but is made somewhat longer in order to engage the fingers themselves, as indicated in Fig. 8. The motion of the cam is directed by a cylindrical guide member 240 received upon a collar 21'7 and provided with slots 248 which engage pins 250 attached to the cam. The collar 247 is provided with a hub 2 1-9 within which the shaft is freely rotatable. The assembly is maintained stationary by a band 251 encircling the guide mem her and connected with the standard 27 through a link ()wing to the angularity of the working face of the cam, it is desirable that the recession of the cam shall not take p ace in a longitudinal direction. It will be seen that if the cam recedes in a longitudinal direction, the actuation of the compression fingers 240 takes place progressively later in each cycle as the winding on the coil builds up. That is to say, at the beginning of the winding, the fingers will be actuated immediately upon the laying of the wire on the form, but as the cam moves toward the left, the operation of the fingers will be retarded for a considerable period after the laying of the wire. To obviate this difficulty, the cam is preferably given a slight rotation as it recedes in order to bring its active surface always in the proper time relation with respect to the fingers. To this end, the slots 248 are cut at an angle substantially equal to the angle of the cam in order that the proper finger may be ac tuated to start compression of the winding immediately after laying the wire about the corresponding arm of the form. The longitudinal motion of the cam is provided by a screw 252 having buttress threads, as indi cated in Fig. 7. The screw is mounted between a bracket 290 on a band 292 which encircles the hub 249 and a bracket 294 at tached to the right hand end of the guide member 246. Cooperating with the screw 252 is av split nut 258 having internal buttress threads, the halves of the nut being maintained in normal engagement by a spring 260. The nut 258 is connected through a link 262 with a collar 264 seated in a recess of the cam 60. A star wheel 256 is provided at the left hand end of the screw 252. The screw is rotated in accordance with the building up of the winding upon the skeleton form through the engagement with the star wheel of a roller 254 attached near the periphery of a rotating flanged disk 255, which is secured to the main shaft 24 through the pin 38. Upon rotation of the star wheel 256, the split nut 258 is caused to travel toward the left over the screw 252,

thereby causing the cam to recede in a direction determined by the motion of the pin 250 in the slot 248. The initial position of the cam may be changed if desired by loosening the band 251 and rotating the guide member 246 with its associated parts into the desired position. The pin 250 is connected by a suitable cable 268 passing over thepulley 270 to the hand lever 124. Upon completion of the winding, the actuation of the hand lever not only releases the retaining member 12 from the forming-head, but draws the cam into its proper position for the next winding, the split nut 258 being dragged over the buttress threads of the screw in the usual manner. The rate of recession of the cam in the guide member is determined by the number of points on the star wheel 256 and the number of rollers 254 supplied to engage with the star wheel. For example, in the specific construction shown, the screw 252 has twelve threads per inch and the five point star wheel 256 is engaged by only one roller 254. This construction is proper for the winding of wire running approximately sixty turns to the inch. By providing three regularly disposed rollers upon the disk 255 and emprising a forming head vention has been illustrated and described, it i will be understood that the invention is susceptible of other embodiments and that the specific arrangement and combination of parts may be modified without departing from the broader features of the invention.

Having thus described the invention,

what is claimed is:

1. A machine for winding material on a skeleton form comprising a rotatable hemispherical forming head, means for holding the skeleton form in engagement with the forming head, and means including a guiding member oscillating synchronously with the rotation of the forming head for guiding the winding maerial on opposite sides of adjacent arms of the skeleton form.

2. A machine for winding material on a skeleton form having a central hub and a plurality of spaced arms, the machine comhaving a seat adapted to engage the central hub of the form, and a plurality of arms, a retaining member for holding the skeleton form on the forming head, means for guiding the material on opposite sides of adjacent arms of the form, and means acting between the arms of the forming head for forcing the successive convolutions of material into close engagement.

3. A machine for winding material on a skeleton form having a central hub and a plurality of spaced arms, the machine comprising a rotatable hemispherical forming head provided with a seat for engaging the central hub of the form and having a plurality of regularly spaced slots between which the arms of the form are received, a retaining member for holding the skeleton form in place upon the forming head, means for guiding the winding material on opposite sides of adjacent arms of the form, and fingers movable in the slots of the forming head for forcing each convolution of wire as it is laid into close engagement with the preceding convolution.

4. A winding machine comprising a rotatable shaft, a forming head connected with the shaft and adapted to receive a skeleton winding form having a plurality of spaced arms, means for maintaining the skeleton form in engagement with the forming head, a member for guiding winding material upon the skeleton form, and means for oscillating the member in accordance with the rotation of the shaft to lay the material upon opposite sides of adjacent arms of the form.

5. A winding machine comprising a shaft, a forming head connected with the shaft and adapted to engage the spaced arms of a skeleton winding support, a retaining memher for holding the support in engagement with the forming head, a shaft upon which the retaining member is mounted, means for connecting the forming head with the retaining member to rotate the retaining member, and a hand lever for releasing the retaining member from engagement with the forming head upon completion of the winding.

6. A winding machine comprising a shaft, a forming head connected with the shaft, a second shaft aligning with the first shaft, a retaining member mounted upon the second shaft and adapted to maintain a skeleton winding form in engagement with the forming head, means for rotating the first shaft to rotate the forming head, means for imparting the motion of the forming head to the retaining member, and means for permitting longitudinal motion of the second shaft to disengage the retaining member from the forming head upon completion of the winding.

7. A winding machine comprising a fo ming head adapted to receive a skeleton winding form, a shaft upon which the forming head is received, a second shaft aligning therewith, a retaining member mounted upon the second shaft and adapted to hold the winding form in engagement with the forming head, means for driving the first shaft, and means for positively engaging the forming head with the retaining member for rotating the latter constructed and arranged to allow engagement between the forming head and the retaining member within a small fraction of a revolution.

8. A winding machine comprising a shaft, a forming head having a seat adapted to receive a skeleton winding form and provided on its outer face with a series of concentrically disposed openings, a second shaft aligning with the first shaft, a retaining member mounted upon the second shaft and provided with a flange opposing the seat of the forming head to maintain the skeleton form in close engagement with the forming head, and a plurality of pins mounted on the retaining member designed and arranged to permit engagement at any time of only one pin in any of the openings of the forming head.

9. A winding machine comprising a rotatable forming head adapted to engage a skeleton winding form having a central hub portion and a plurality of spaced arms, a retaining member provided with a flange adapted to maintain the hub of the winding form in enga ement with the forming head and having a ring connected with the flange to enclose the arms of the winding form, a shaft upon which the retaining'member is mounted, bearings for the shaft, and a hand lever connected with the shaft for moving the retaining member into and out of engagement with the forming head.

10. A machine for winding basket weaves comprising a shaft, a forming head connected to the shaft and provided with a plurality of arms adapted to receive the arms of a skeleton winding form, means for laying winding material upon the successive arms of the form, a plurality of compression fingers movable in the slots between the arms, a cam over which the fingers are movable to successively actuate the fingers in a manner to compress the winding, means for guiding the lingers in their motion, and means for permitting the cam to recede upon building up of the winding.

11. A machine for winding basket weaves comprising a rotatable shaft, a forming head connected to the shaft and provided with a plurality of regularly disposed slots, means for maintainin a skeleton winding form upon the forming head with the arms of the form between the slots of the forming head,

a series of fingers longitudinally movable in the slots, a cam for successively actuating the fingers to compress the winding, and means for moving the cam rearwardly in accordance with the building up of the winding.

12. A winding machine comprising-a rotatable shaft, a forming head secured to the shaft and provided with a plurality of regularly spaced slots, means for maintaining a skeleton winding form in engagement with the forming head, means for laying wire or similar material upon the skeleton form upon rotation of the shaft, 21- series of compression fingers longitudinally movable in the slots of the forming head, a camfor successively actuating the fingers to initiate compression of the winding immediately upon. laying the wire upon the skeleton form, a screw rotatable in accordance with the rotation of the shaft, and cooperating means for causing the cam to recede upon rotation of the screw.

13. A winding machine comprising a rotatable shaft, a forming head secured to the shaft and provided with a plurality of radially spaced slots, means for maintaining a skeleton winding form in engagement with the forming head, means for laying wire or similar material on the skeleton form upon rotation of the shaft, a series of compression fingers longitudinally movable in the slots of the forming head, a cam for successively actuating the fingers to initiate compression of the winding immediately upon laying the wire on the skeleton form, a screw rotatable in accordance with the rotation of the shaft, cooperating means for causing the cam to recede upon rotation of the screw, and means for imparting a rotational motion to the cam upon recession of the cam in accordance with the angularity of the bearing face of the cam.

14. A winding machine comprising a shaft, a rotatable forming head connected to the shaft and adapted to receive a winding form, means for guiding winding material upon the form, a belt-driven pulley rotatable over the shaft, means for engaging the pulley with the shaft to rotate the shaft, a release slidable over the shaft, and gear connections between the shaft and the release to cause the release to slide longitudinally of the shaft and disengage the pulley at the completion of a predetermined number of turns of the shaft.

15. A winding machine comprising a shaft, a rotatable forming head connected to the shaft and adapted to receive a winding form, means for laying wire or similar material upon the form, a belt-driven pulley rotatable upon the shaft, means for engaging the pulley with the shaft to rotate the shaft, a worm connected to the shaft, a release slidable over the shaft, and gear connections between the worm and the release to cause the release to slide longitudinally of the shaft and disengage the pulley after a predetermined number of turns of the shaft.

16. A winding machine comprising a shaft, forming head connected to the shaft and adapted to receive a skeleton winding form, means for guiding winding material upon the form, a retaining member adapted to maintain the winding form in engagement with the forming head, a hand lever for moving the retaining member into and out of engagement with the forming head, a driving wheel rotatable over the shaft, means for engaging the driving wheel with the shaft to rotate the shaft, a sliding release adapted to disengage the driving wheel from the shaft, a worm wheel and a cooperating rack and pinion for advancing the release over the shaft, a clutch mechanism interposed between the worm wheel and the rack and pinion, means actuated by the hand lever for disengaging the clutch, and means for restoring the release to normal position upon disengagement of the clutch.

17. A winding machine comprising a r shaft, a forming head attached to the shaft and adapted to engage a skeleton windmg form, a retaining member engaging the forming head to maintain the winding form securely in position, means for guiding winding material upon the form, a hand lever for disengaging the retaining member from the forming head, a belt driven pulley rotatable over the shaft, means for engaging the pulley with the shaft to rotate the shaft, means for disengaging the pulley from the shaft at the completion of a predetermined number of turns of the forming head, a clutch mechanism, means for actuating the release mechanism from the rotation of the shaft through the clutch mechanism means cooperating with the hand lever for slipping the clutch upon disengaging the retaining member from the forming head, and means for restoring the release mechanism to its original position upon slipping the clutch. 18. A winding machine comprising a forming head of predetern'iined curvature, neans for clamping a flexible skeleton form having a plurality of arms in engagement with the forming head, means for winding a series of convolutions of winding material upon the arms in a manner to draw the arms against the forming head and impart the curvature of the head to the form, and means for automatically terminating the winding operation after a predetermined number of turns have been wound upon the arms.

ISRAEL 0. ORSVJELL. 

